Jig for assembling apparatus.



PATENTED MAY 29, 1906.

N. MARSHALL.

JIG FOR ASSEMBLING APPARATUS.

APPLICATION FILED SEPT 28 1905 IINITED s ATEs PATENT OFFICE.

Specification of Letters Patent.

Patented May .29, 1906.

Original application filed January 19, 1905, Serial No. 241,884. Dividedand this application filed September 2 8, 1 905. Serial No. 280, 540.

To a. whom, it may concern:

Be it known that I, NORMAN MARSHALL, a citizen of the United States, anda resident of'Newton, county of MiddleseX, Massachusetts, have inventedcertain new anduseful Improvements in Jigs for Assembling Appa ratus, ofwhich the following'is a specification.

The object of the invention is to produce a work-carrying ig by whichthe center terminal and base of a lamp-socket may be sup.- ported inproper relative position for the insertion of thescrew which secures theparts together.

Such a jig may be'used with especial advantage in supporting the partsand presenting them to the action of an automatic screwdriving mechanismor to a mechanism for automatically feeding and driving the screws.

In producing a jig which admits of the ready and convenient placing andremoving of the parts and which will efficiently hold them in properrelative position I have provided the jig with a central part adapted tofit within the screw-shell of the socket and have also provided a devicefor engaging a recess in the base and holding the base and attachedparts in fixed angular position on the jig.

The jig is also provided with devices for determining and maintainingthe angular position. of the center terminal on the jig and forretaining the terminal in the recess formed in the base for itsreception.

The various features of the invention will be set forth in the claimsand will be understood fromthe following detailed description of thejig, (shown in the drawings,) which embodies the features in the simpleand efficient form in which I prefer to use them' In the drawings,Figure 1 is an elevation of the jig, the porcelain base of a socketbeing shown in dotted lines. Fig. 2 is a section on line 2 2, Fig. 1,showing the base and termi nal in position. Fig. 3 is a plan View of thejig, and Fig. 4 is a perspective view of a porcelain base.

As shown in the drawings, the jig is provided with a centralsupporting-post j, which is cylindrical and of a size to fit within thescrew-shell 4 of the socket. The jig is also provided with a verticalrod or post 9' so arranged that it will lie in the groove 1 of the basewhen the base is in position on the jig and willdetermine and maintainthe angu lar position of the base. The angular position ofthe'centerterminal 7 is determined and maintained by means of an annular rib j,formed on the top of postj and provided with a slot 3' within which thearm of the terminal fits. The terminal is held in position within therecess 7 of the base by means of an arm 3' projecting from-the rod 3'and provided with a laterall; -projecting end for engaging the terminal.The end of the arm is slottedat 7' sothat' the end-of the screw 8 maypass through the base of the terminal'as the screw is driven into theterminal7.

In order to enable the ready application and removal of the parts, therod 3 is mounted to turn in the base of the jig and is forced inadirection to press the end of the arm 3' against the terminal 7' by aspring'j The rod is turned against the tension of the spring by pressingI on a projecting fingerpiece j when the parts are to be applied to thejig or removed therefrom.

A spring-arm may be mounted upon the rod. 3' in position to engage theupper side of the porcelain base 1 and assist in holding the partsfirmly on the jig.

In applying the parts to the jig the operator inserts the mica disk 9within the shell 4, places the terminal 7 within the recess 7, and thenslips the shell 4 over the post j, holding the base 1 in proper relationfor the rod to enter the groove 1 The rod is turned back during theapplication of the parts to the jig, so that the arms and 3' do notinterfere with the positioning of the parts. When the parts have beenplaced in position, the rod j is released and the spring f acts to pressthe end of arm firmly against the terminal, holding it securely inplace, the spring-arm 1' overriding the upper end of the base 1 andholding it in place. The screw 8 may then be introduced into the recess8 by hand or automatically and may be driven home by a screw-driver, asindicated at I in Fig. 2.

The jig above described is well adapted for use in a machine in which aseries of jigs are brought successively into position be neath anautomatically-operated screw-driving mechanism. When so used, the jigsmay be secured to a table B and may be brought successively intoposition beneath the screw-driving mechanism I by intermittent movementof the table.

Without attempting to set forth in detail.

the various forms in which the invention may be embodied, what I claim,and desire to secure by Letters Patent, is

1. A work-supporting jig provided with a projection arranged to engage arecess in a socket-base,, and devices for retaining the center terminalin position on the base.

2. A work-supp0rting jig provided with a support tofit the shell of asocket, a rod arranged to engage a groove of the socket-base and devicesfor retaining the center terminal in position on the base.

3. A work-supporting jig provided with a support to fit the shell of thesocket, a rod arranged to engage a groove of the socket-base, and aspring-operated arm for engaging the center terminal and retaining it inthe recess in the base.

4. A'work-supporting jig provided with a support to fit the shell of thesocket, a projection arranged to engage a recess in the socket-base andretaln it in angular position, and an arm arranged to engage the centerterminal and retain it in the recess in the base.

5. A work-supporting jig provided with a central support for enteringthe screw-shell, a pivoted rod arranged to enter a groove of thesocket-base, a laterally-projecting arm carried by the rod and arrangedto engage the center terminal and hold it on the socketbase.-

6. A work-supporting jig provided with a central support for enteringthe socket-shell, an annular rib on the top of the support provided witha slot for the arm of the center terminal a pivoted rod arranged toengage a groove of the socket-base, and a terminalengaging arm carriedby the rod.

7. A work-supporting jig provided with a central support to fit thesocket-shell, a pivoted spring-operated rod arranged to enter a groovein the socket-base, and a laterallyprojecting terminal-engaging arm onthe rod.

8. A work-supporting jig provided with a central support .to fit thesocket-shell, a pivoted rod arranged to enter agroove in thesocket-base, and a laterally-proj ecting springarm on the rod arrangedto overlie the socketbase.

In witness whereof I have hereunto set my hand this 5th day ofSeptember, 1905.

NORM N MARSHALL.

Witnesses: I

IRA L. FISH, KATHARINE A, DUGAN.

